Effect of feeding strategy on the mechanical properties of PP/recycled EPDM/PP-G-MA blends / P. Mahallati in INTERNATIONAL POLYMER PROCESSING, Vol. XXIX, N° 2 (05/2014)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXIX, N° 2 (05/2014) . - p. 280-286 Titre : Effect of feeding strategy on the mechanical properties of PP/recycled EPDM/PP-G-MA blends Type de document : texte imprimé Auteurs : P. Mahallati, Auteur ; Denis Rodrigue, Auteur Année de publication : 2014 Article en page(s) : p. 280-286 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alliages polymères Alliages polymères -- propriétés mécaniques Anhydride maléique Caractérisation Compoundage Elastomères thermoplastiques Etat fondu (matériaux) Ethylène-propylène-diène monomère Matières plastiques -- Extrusion Matières plastiques -- Moulage par injection Matières plastiques -- Recyclage Morphologie (matériaux) Polypropylène Index. décimale : 668.9 Polymères Résumé : In this work, thermoplastic elastomers based on polypropylene (PP) and recycled ethylene-propylene-diene monomer (r-EPDM) blends with polypropylene-graft-maleic anhydride (PP-g-MA) as modifier (0 to 8?wt.%) were prepared by melt compounding via twin-screw extrusion followed by injection molding. In particular, the effects of material composition and feeding strategies were studied. The morphological and mechanical properties of the blends were investigated by using scanning electron microscopy (SEM), tensile, flexural, impact, density and hardness tests. The results indicate that good dispersion and compatibility between PP and r-EPDM particles was obtained and that incorporation of r-EPDM leads to significant increase in PP impact strength. Finally, the feeding order of each component in the extruder was found to modify substantially the final morphology of the blend, thus having a direct influence on their mechanical properties. Note de contenu : - EXPERIMENTAL : Materials - Blend preparation - Characterization - RESULTS AND DISCUSSION : Morphologie - Mechanical properties DOI : 10.3139/217.2855 En ligne : https://drive.google.com/file/d/14Gw1NkgW444kEa1WozKrun3OoPs7SNc3/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21323 [article]

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Effect of feeding strategy on the properties of PP/recycled EPDM blends / P. Mahallati in INTERNATIONAL POLYMER PROCESSING, Vol. XXX, N° 2 (05/2015)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXX, N° 2 (05/2015) . - p. 276-283 Titre : Effect of feeding strategy on the properties of PP/recycled EPDM blends Type de document : texte imprimé Auteurs : P. Mahallati, Auteur ; Denis Rodrigue, Auteur Année de publication : 2015 Article en page(s) : p. 276-283 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alliages polymères -- propriétés mécaniques Elastomères thermoplastiques -- Extrusion Elastomères thermoplastiques -- Moulage par injection Essais dynamiques Ethylène-propylène-diène monomère Extrudeuse bi-vis Morphologie (matériaux) Polypropylène Résistance au chocs Technique de la production Index. décimale : 668.4 Plastiques, vinyles Résumé : In this work, thermoplastic elastomers (TPE) were produced based on polypropylene (PP) and recycled ethylene-propylene-diene monomer (r-EPDM) through twin-screw extrusion followed by injection molding. In particular, the effect of different feeding strategies (component introduction order and position along the screw) and r-EPDM content (0, 20, 35, 50 and 65% wt.) were studied. From the materials produced, morphological and mechanical characterizations were carried out. The results show that feeding strategy has a substantial influence on dispersion and compatibility between PP and r-EPDM. The main result is that r-EPDM can significantly increase PP impact strength (495%) with optimized processing conditions. Note de contenu : - EXPERIMENTAL : Materials - Blend preparation - Characterization - RESULTS AND DISCUSSION : Morphology - Mechanical properties DOI : 10.3139/217.3008 En ligne : https://drive.google.com/file/d/16k3RaqJMLISOkklPIKf_-PCB-G1Xt14a/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23910 [article]

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Thermoplastic elastomer nanocomposites based on PA6/NBR / P. Mahallati in INTERNATIONAL POLYMER PROCESSING, Vol. XXV, N° 2 (05/2010)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXV, N° 2 (05/2010) . - p. 132-138 Titre : Thermoplastic elastomer nanocomposites based on PA6/NBR Type de document : texte imprimé Auteurs : P. Mahallati, Auteur ; A. Arefazar, Auteur ; Ghasem Naderi, Auteur Année de publication : 2010 Article en page(s) : p. 132-138 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Elastomères thermoplastiques Matériaux hybrides Index. décimale : 668.9 Polymères Résumé : Thermoplastic elastomer nanocomposites (TPE nanocomposites) based on PA6/ NBR/Cloisite 30B were prepared through a direct melt mixing process in an internal mixer. The effects of NBR content (10, 30 and 50 wt.%) and nanoclay loading (3, 5 and 7 wt.%) on morphology and mechanical properties of the nanocomposites have been studied and compared with unfilled PA6/NBR blends as well. The TPE nanocomposites were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), differential scanning calorimeter (DSC) and mechanical properties. XRD results suggested that the nanoclay is exfoliated into the TPE nanocomposite matrix. TEM image of the PA6/NBR/nanoclay composite showed partial exfoliated structure of silicate layers dispersed through the both NBR and PA6 phases. The SEM photomicrograph of PA6/NBR nanocomposite showed an increasing of the rubber particles size in comparison with unfilled PA6/NBR TPE. By presence of nanoclay, improved modulus of the prepared TPE nanocomposites was achieved. DSC studies showed that loading of the nanoclay reduced the degree of crystallinity of the nanocomposite samples. DOI : 10.3139/217.2311 En ligne : https://drive.google.com/file/d/1-jZKwbuIsJX_XeCDe7vHbHq2fRohLz_u/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9327 [article]

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